London has 32 boroughs and the City of London, and people search the way they live, by neighbourhood. A tenant in Hackney looks for a letting agent near Dalston or Clapton.
A landlord in Croydon wants a managing agent who knows the rail lines into south London. A homeowner in Richmond may be hiring for an older house near the river.
Inner London is mostly flats and converted period houses, and outer boroughs such as Bromley have more houses with drives and gardens. For anyone with a van, the river, parking zones, the congestion charge and ULEZ (the low-emission zone charge) change the cost of every trip.
Rightmove, Zoopla and OnTheMarket own the home-browsing side, so independent firms win elsewhere, with neighbourhood pages, good reviews and a phone that gets answered. All of London is too much map for a small firm, so we start narrow.